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[libata] ATA passthru (arbitrary ATA command execution)

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Authors:
Brett Russ <russb@emc.com>
John W. Linville <linville@tuxdriver.com>
Andy Warner <andyw@pobox.com>
This commit is contained in:
Jeff Garzik 2005-05-12 15:45:22 -04:00
parent 88d7bd8cb9
commit b095518ef5
3 changed files with 556 additions and 109 deletions
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659
drivers/scsi/libata-scsi.c
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@ -29,10 +29,13 @@
#include "scsi.h"
#include <scsi/scsi_host.h>
#include <linux/libata.h>
#include <linux/hdreg.h>
#include <asm/uaccess.h>
#include "libata.h"
#define SECTOR_SIZE 512
typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc, u8 *scsicmd);
static struct ata_device *
ata_scsi_find_dev(struct ata_port *ap, struct scsi_device *scsidev);
@ -67,6 +70,148 @@ int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
return 0;
}
/**
* ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
* @dev: Device to whom we are issuing command
* @arg: User provided data for issuing command
*
* LOCKING:
* Defined by the SCSI layer. We don't really care.
*
* RETURNS:
* Zero on success, negative errno on error.
*/
int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
{
int rc = 0;
u8 scsi_cmd[MAX_COMMAND_SIZE];
u8 args[4], *argbuf = NULL;
int argsize = 0;
struct scsi_request *sreq;
if (NULL == (void *)arg)
return -EINVAL;
if (copy_from_user(args, arg, sizeof(args)))
return -EFAULT;
sreq = scsi_allocate_request(scsidev, GFP_KERNEL);
if (!sreq)
return -EINTR;
memset(scsi_cmd, 0, sizeof(scsi_cmd));
if (args[3]) {
argsize = SECTOR_SIZE * args[3];
argbuf = kmalloc(argsize, GFP_KERNEL);
if (argbuf == NULL)
return -ENOMEM;
scsi_cmd[1] = (4 << 1); /* PIO Data-in */
scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
block count in sector count field */
sreq->sr_data_direction = DMA_FROM_DEVICE;
} else {
scsi_cmd[1] = (3 << 1); /* Non-data */
/* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */
sreq->sr_data_direction = DMA_NONE;
}
scsi_cmd[0] = ATA_16;
scsi_cmd[4] = args[2];
if (args[0] == WIN_SMART) { /* hack -- ide driver does this too... */
scsi_cmd[6] = args[3];
scsi_cmd[8] = args[1];
scsi_cmd[10] = 0x4f;
scsi_cmd[12] = 0xc2;
} else {
scsi_cmd[6] = args[1];
}
scsi_cmd[14] = args[0];
/* Good values for timeout and retries? Values below
from scsi_ioctl_send_command() for default case... */
scsi_wait_req(sreq, scsi_cmd, argbuf, argsize, (10*HZ), 5);
if (sreq->sr_result) {
rc = -EIO;
goto error;
}
/* Need code to retrieve data from check condition? */
if ((argbuf)
&& copy_to_user((void *)(arg + sizeof(args)), argbuf, argsize))
rc = -EFAULT;
error:
scsi_release_request(sreq);
if (argbuf)
kfree(argbuf);
return rc;
}
/**
* ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
* @dev: Device to whom we are issuing command
* @arg: User provided data for issuing command
*
* LOCKING:
* Defined by the SCSI layer. We don't really care.
*
* RETURNS:
* Zero on success, negative errno on error.
*/
int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
{
int rc = 0;
u8 scsi_cmd[MAX_COMMAND_SIZE];
u8 args[7];
struct scsi_request *sreq;
if (NULL == (void *)arg)
return -EINVAL;
if (copy_from_user(args, arg, sizeof(args)))
return -EFAULT;
memset(scsi_cmd, 0, sizeof(scsi_cmd));
scsi_cmd[0] = ATA_16;
scsi_cmd[1] = (3 << 1); /* Non-data */
/* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */
scsi_cmd[4] = args[1];
scsi_cmd[6] = args[2];
scsi_cmd[8] = args[3];
scsi_cmd[10] = args[4];
scsi_cmd[12] = args[5];
scsi_cmd[14] = args[0];
sreq = scsi_allocate_request(scsidev, GFP_KERNEL);
if (!sreq) {
rc = -EINTR;
goto error;
}
sreq->sr_data_direction = DMA_NONE;
/* Good values for timeout and retries? Values below
from scsi_ioctl_send_command() for default case... */
scsi_wait_req(sreq, scsi_cmd, NULL, 0, (10*HZ), 5);
if (sreq->sr_result) {
rc = -EIO;
goto error;
}
/* Need code to retrieve data from check condition? */
error:
scsi_release_request(sreq);
return rc;
}
int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
{
struct ata_port *ap;
@ -96,6 +241,16 @@ int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
return -EINVAL;
return 0;
case HDIO_DRIVE_CMD:
if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
return -EACCES;
return ata_cmd_ioctl(scsidev, arg);
case HDIO_DRIVE_TASK:
if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
return -EACCES;
return ata_task_ioctl(scsidev, arg);
default:
rc = -ENOTTY;
break;
@ -154,24 +309,69 @@ struct ata_queued_cmd *ata_scsi_qc_new(struct ata_port *ap,
}
/**
* ata_to_sense_error - convert ATA error to SCSI error
* @qc: Command that we are erroring out
* @drv_stat: value contained in ATA status register
* ata_dump_status - user friendly display of error info
* @id: id of the port in question
* @tf: ptr to filled out taskfile
*
* Converts an ATA error into a SCSI error. While we are at it
* we decode and dump the ATA error for the user so that they
* have some idea what really happened at the non make-believe
* layer.
* Decode and dump the ATA error/status registers for the user so
* that they have some idea what really happened at the non
* make-believe layer.
*
* LOCKING:
* inherited from caller
*/
void ata_dump_status(unsigned id, struct ata_taskfile *tf)
{
u8 stat = tf->command, err = tf->feature;
printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
if (stat & ATA_BUSY) {
printk("Busy }\n"); /* Data is not valid in this case */
} else {
if (stat & 0x40) printk("DriveReady ");
if (stat & 0x20) printk("DeviceFault ");
if (stat & 0x10) printk("SeekComplete ");
if (stat & 0x08) printk("DataRequest ");
if (stat & 0x04) printk("CorrectedError ");
if (stat & 0x02) printk("Index ");
if (stat & 0x01) printk("Error ");
printk("}\n");
if (err) {
printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
if (err & 0x04) printk("DriveStatusError ");
if (err & 0x80) {
if (err & 0x04) printk("BadCRC ");
else printk("Sector ");
}
if (err & 0x40) printk("UncorrectableError ");
if (err & 0x10) printk("SectorIdNotFound ");
if (err & 0x02) printk("TrackZeroNotFound ");
if (err & 0x01) printk("AddrMarkNotFound ");
printk("}\n");
}
}
}
/**
* ata_to_sense_error - convert ATA error to SCSI error
* @drv_stat: value contained in ATA status register
* @drv_err: value contained in ATA error register
* @sk: the sense key we'll fill out
* @asc: the additional sense code we'll fill out
* @ascq: the additional sense code qualifier we'll fill out
*
* Converts an ATA error into a SCSI error. Fill out pointers to
* SK, ASC, and ASCQ bytes for later use in fixed or descriptor
* format sense blocks.
*
* LOCKING:
* spin_lock_irqsave(host_set lock)
*/
void ata_to_sense_error(struct ata_queued_cmd *qc, u8 drv_stat)
void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, u8 *asc,
u8 *ascq)
{
struct scsi_cmnd *cmd = qc->scsicmd;
u8 err = 0;
unsigned char *sb = cmd->sense_buffer;
int i;
/* Based on the 3ware driver translation table */
static unsigned char sense_table[][4] = {
/* BBD|ECC|ID|MAR */
@ -212,105 +412,183 @@ void ata_to_sense_error(struct ata_queued_cmd *qc, u8 drv_stat)
{0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
{0xFF, 0xFF, 0xFF, 0xFF}, // END mark
};
int i = 0;
cmd->result = SAM_STAT_CHECK_CONDITION;
/*
* Is this an error we can process/parse
*/
if(drv_stat & ATA_ERR)
/* Read the err bits */
err = ata_chk_err(qc->ap);
/* Display the ATA level error info */
printk(KERN_WARNING "ata%u: status=0x%02x { ", qc->ap->id, drv_stat);
if(drv_stat & 0x80)
{
printk("Busy ");
err = 0; /* Data is not valid in this case */
if (drv_stat & ATA_BUSY) {
drv_err = 0; /* Ignore the err bits, they're invalid */
}
else {
if(drv_stat & 0x40) printk("DriveReady ");
if(drv_stat & 0x20) printk("DeviceFault ");
if(drv_stat & 0x10) printk("SeekComplete ");
if(drv_stat & 0x08) printk("DataRequest ");
if(drv_stat & 0x04) printk("CorrectedError ");
if(drv_stat & 0x02) printk("Index ");
if(drv_stat & 0x01) printk("Error ");
}
printk("}\n");
if(err)
{
printk(KERN_WARNING "ata%u: error=0x%02x { ", qc->ap->id, err);
if(err & 0x04) printk("DriveStatusError ");
if(err & 0x80)
{
if(err & 0x04)
printk("BadCRC ");
else
printk("Sector ");
if (drv_err) {
/* Look for drv_err */
for (i = 0; sense_table[i][0] != 0xFF; i++) {
/* Look for best matches first */
if ((sense_table[i][0] & drv_err) ==
sense_table[i][0]) {
*sk = sense_table[i][1];
*asc = sense_table[i][2];
*ascq = sense_table[i][3];
goto translate_done;
}
}
if(err & 0x40) printk("UncorrectableError ");
if(err & 0x10) printk("SectorIdNotFound ");
if(err & 0x02) printk("TrackZeroNotFound ");
if(err & 0x01) printk("AddrMarkNotFound ");
printk("}\n");
/* Should we dump sector info here too ?? */
/* No immediate match */
printk(KERN_WARNING "ata%u: no sense translation for "
"error 0x%02x\n", id, drv_err);
}
/* Look for err */
while(sense_table[i][0] != 0xFF)
{
/* Look for best matches first */
if((sense_table[i][0] & err) == sense_table[i][0])
{
sb[0] = 0x70;
sb[2] = sense_table[i][1];
sb[7] = 0x0a;
sb[12] = sense_table[i][2];
sb[13] = sense_table[i][3];
return;
}
i++;
}
/* No immediate match */
if(err)
printk(KERN_DEBUG "ata%u: no sense translation for 0x%02x\n", qc->ap->id, err);
i = 0;
/* Fall back to interpreting status bits */
while(stat_table[i][0] != 0xFF)
{
if(stat_table[i][0] & drv_stat)
{
sb[0] = 0x70;
sb[2] = stat_table[i][1];
sb[7] = 0x0a;
sb[12] = stat_table[i][2];
sb[13] = stat_table[i][3];
return;
for (i = 0; stat_table[i][0] != 0xFF; i++) {
if (stat_table[i][0] & drv_stat) {
*sk = stat_table[i][1];
*asc = stat_table[i][2];
*ascq = stat_table[i][3];
goto translate_done;
}
i++;
}
/* No error ?? */
printk(KERN_ERR "ata%u: called with no error (%02X)!\n", qc->ap->id, drv_stat);
/* additional-sense-code[-qualifier] */
/* No error? Undecoded? */
printk(KERN_WARNING "ata%u: no sense translation for status: 0x%02x\n",
id, drv_stat);
/* For our last chance pick, use medium read error because
* it's much more common than an ATA drive telling you a write
* has failed.
*/
*sk = MEDIUM_ERROR;
*asc = 0x11; /* "unrecovered read error" */
*ascq = 0x04; /* "auto-reallocation failed" */
translate_done:
printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x to "
"SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n", id, drv_stat, drv_err,
*sk, *asc, *ascq);
return;
}
/*
* ata_gen_ata_desc_sense - Generate check condition sense block.
* @qc: Command that completed.
*
* This function is specific to the ATA descriptor format sense
* block specified for the ATA pass through commands. Regardless
* of whether the command errored or not, return a sense
* block. Copy all controller registers into the sense
* block. Clear sense key, ASC & ASCQ if there is no error.
*
* LOCKING:
* spin_lock_irqsave(host_set lock)
*/
void ata_gen_ata_desc_sense(struct ata_queued_cmd *qc)
{
struct scsi_cmnd *cmd = qc->scsicmd;
struct ata_taskfile *tf = &qc->tf;
unsigned char *sb = cmd->sense_buffer;
unsigned char *desc = sb + 8;
memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
cmd->result = SAM_STAT_CHECK_CONDITION;
/*
* Read the controller registers.
*/
assert(NULL != qc->ap->ops->tf_read);
qc->ap->ops->tf_read(qc->ap, tf);
/*
* Use ata_to_sense_error() to map status register bits
* onto sense key, asc & ascq.
*/
if (unlikely(tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ))) {
ata_to_sense_error(qc->ap->id, tf->command, tf->feature,
&sb[1], &sb[2], &sb[3]);
sb[1] &= 0x0f;
}
/*
* Sense data is current and format is descriptor.
*/
sb[0] = 0x72;
desc[0] = 0x09;
/*
* Set length of additional sense data.
* Since we only populate descriptor 0, the total
* length is the same (fixed) length as descriptor 0.
*/
desc[1] = sb[7] = 14;
/*
* Copy registers into sense buffer.
*/
desc[2] = 0x00;
desc[3] = tf->feature; /* == error reg */
desc[5] = tf->nsect;
desc[7] = tf->lbal;
desc[9] = tf->lbam;
desc[11] = tf->lbah;
desc[12] = tf->device;
desc[13] = tf->command; /* == status reg */
/*
* Fill in Extend bit, and the high order bytes
* if applicable.
*/
if (tf->flags & ATA_TFLAG_LBA48) {
desc[2] |= 0x01;
desc[4] = tf->hob_nsect;
desc[6] = tf->hob_lbal;
desc[8] = tf->hob_lbam;
desc[10] = tf->hob_lbah;
}
}
/**
* ata_gen_fixed_sense - generate a SCSI fixed sense block
* @qc: Command that we are erroring out
*
* Leverage ata_to_sense_error() to give us the codes. Fit our
* LBA in here if there's room.
*
* LOCKING:
* inherited from caller
*/
void ata_gen_fixed_sense(struct ata_queued_cmd *qc)
{
struct scsi_cmnd *cmd = qc->scsicmd;
struct ata_taskfile *tf = &qc->tf;
unsigned char *sb = cmd->sense_buffer;
memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
cmd->result = SAM_STAT_CHECK_CONDITION;
/*
* Read the controller registers.
*/
assert(NULL != qc->ap->ops->tf_read);
qc->ap->ops->tf_read(qc->ap, tf);
/*
* Use ata_to_sense_error() to map status register bits
* onto sense key, asc & ascq.
*/
if (unlikely(tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ))) {
ata_to_sense_error(qc->ap->id, tf->command, tf->feature,
&sb[2], &sb[12], &sb[13]);
sb[2] &= 0x0f;
}
sb[0] = 0x70;
sb[2] = MEDIUM_ERROR;
sb[7] = 0x0A;
if (cmd->sc_data_direction == DMA_FROM_DEVICE) {
sb[12] = 0x11; /* "unrecovered read error" */
sb[13] = 0x04;
} else {
sb[12] = 0x0C; /* "write error - */
sb[13] = 0x02; /* auto-reallocation failed" */
sb[7] = 0x0a;
if (tf->flags & ATA_TFLAG_LBA && !(tf->flags & ATA_TFLAG_LBA48)) {
/* A small (28b) LBA will fit in the 32b info field */
sb[0] |= 0x80; /* set valid bit */
sb[3] = tf->device & 0x0f;
sb[4] = tf->lbah;
sb[5] = tf->lbam;
sb[6] = tf->lbal;
}
}
@ -626,11 +904,36 @@ static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, u8 *scsicmd)
static int ata_scsi_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat)
{
struct scsi_cmnd *cmd = qc->scsicmd;
int need_sense = drv_stat & (ATA_ERR | ATA_BUSY | ATA_DRQ);
if (unlikely(drv_stat & (ATA_ERR | ATA_BUSY | ATA_DRQ)))
ata_to_sense_error(qc, drv_stat);
else
cmd->result = SAM_STAT_GOOD;
/* For ATA pass thru (SAT) commands, generate a sense block if
* user mandated it or if there's an error. Note that if we
* generate because the user forced us to, a check condition
* is generated and the ATA register values are returned
* whether the command completed successfully or not. If there
* was no error, SK, ASC and ASCQ will all be zero.
*/
if (((cmd->cmnd[0] == ATA_16) || (cmd->cmnd[0] == ATA_12)) &&
((cmd->cmnd[2] & 0x20) || need_sense)) {
ata_gen_ata_desc_sense(qc);
} else {
if (!need_sense) {
cmd->result = SAM_STAT_GOOD;
} else {
/* TODO: decide which descriptor format to use
* for 48b LBA devices and call that here
* instead of the fixed desc, which is only
* good for smaller LBA (and maybe CHS?)
* devices.
*/
ata_gen_fixed_sense(qc);
}
}
if (need_sense) {
/* The ata_gen_..._sense routines fill in tf */
ata_dump_status(qc->ap->id, &qc->tf);
}
qc->scsidone(cmd);
@ -671,8 +974,8 @@ static void ata_scsi_translate(struct ata_port *ap, struct ata_device *dev,
return;
/* data is present; dma-map it */
if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
cmd->sc_data_direction == DMA_TO_DEVICE) {
if (cmd->sc_data_direction == SCSI_DATA_READ ||
cmd->sc_data_direction == SCSI_DATA_WRITE) {
if (unlikely(cmd->request_bufflen < 1)) {
printk(KERN_WARNING "ata%u(%u): WARNING: zero len r/w req\n",
ap->id, dev->devno);
@ -692,7 +995,6 @@ static void ata_scsi_translate(struct ata_port *ap, struct ata_device *dev,
if (xlat_func(qc, scsicmd))
goto err_out;
/* select device, send command to hardware */
if (ata_qc_issue(qc))
goto err_out;
@ -1304,7 +1606,7 @@ static unsigned int atapi_xlat(struct ata_queued_cmd *qc, u8 *scsicmd)
struct scsi_cmnd *cmd = qc->scsicmd;
struct ata_device *dev = qc->dev;
int using_pio = (dev->flags & ATA_DFLAG_PIO);
int nodata = (cmd->sc_data_direction == DMA_NONE);
int nodata = (cmd->sc_data_direction == SCSI_DATA_NONE);
if (!using_pio)
/* Check whether ATAPI DMA is safe */
@ -1316,7 +1618,7 @@ static unsigned int atapi_xlat(struct ata_queued_cmd *qc, u8 *scsicmd)
qc->complete_fn = atapi_qc_complete;
qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
if (cmd->sc_data_direction == DMA_TO_DEVICE) {
if (cmd->sc_data_direction == SCSI_DATA_WRITE) {
qc->tf.flags |= ATA_TFLAG_WRITE;
DPRINTK("direction: write\n");
}
@ -1340,7 +1642,7 @@ static unsigned int atapi_xlat(struct ata_queued_cmd *qc, u8 *scsicmd)
#ifdef ATAPI_ENABLE_DMADIR
/* some SATA bridges need us to indicate data xfer direction */
if (cmd->sc_data_direction != DMA_TO_DEVICE)
if (cmd->sc_data_direction != SCSI_DATA_WRITE)
qc->tf.feature |= ATAPI_DMADIR;
#endif
}
@ -1393,6 +1695,143 @@ ata_scsi_find_dev(struct ata_port *ap, struct scsi_device *scsidev)
return dev;
}
/*
* ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
* @byte1: Byte 1 from pass-thru CDB.
*
* RETURNS:
* ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
*/
static u8
ata_scsi_map_proto(u8 byte1)
{
switch((byte1 & 0x1e) >> 1) {
case 3: /* Non-data */
return ATA_PROT_NODATA;
case 6: /* DMA */
return ATA_PROT_DMA;
case 4: /* PIO Data-in */
case 5: /* PIO Data-out */
if (byte1 & 0xe0) {
return ATA_PROT_PIO_MULT;
}
return ATA_PROT_PIO;
case 10: /* Device Reset */
case 0: /* Hard Reset */
case 1: /* SRST */
case 2: /* Bus Idle */
case 7: /* Packet */
case 8: /* DMA Queued */
case 9: /* Device Diagnostic */
case 11: /* UDMA Data-in */
case 12: /* UDMA Data-Out */
case 13: /* FPDMA */
default: /* Reserved */
break;
}
return ATA_PROT_UNKNOWN;
}
/**
* ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
* @qc: command structure to be initialized
* @cmd: SCSI command to convert
*
* Handles either 12 or 16-byte versions of the CDB.
*
* RETURNS:
* Zero on success, non-zero on failure.
*/
static unsigned int
ata_scsi_pass_thru(struct ata_queued_cmd *qc, u8 *scsicmd)
{
struct ata_taskfile *tf = &(qc->tf);
struct scsi_cmnd *cmd = qc->scsicmd;
if ((tf->protocol = ata_scsi_map_proto(scsicmd[1])) == ATA_PROT_UNKNOWN)
return 1;
/*
* 12 and 16 byte CDBs use different offsets to
* provide the various register values.
*/
if (scsicmd[0] == ATA_16) {
/*
* 16-byte CDB - may contain extended commands.
*
* If that is the case, copy the upper byte register values.
*/
if (scsicmd[1] & 0x01) {
tf->hob_feature = scsicmd[3];
tf->hob_nsect = scsicmd[5];
tf->hob_lbal = scsicmd[7];
tf->hob_lbam = scsicmd[9];
tf->hob_lbah = scsicmd[11];
tf->flags |= ATA_TFLAG_LBA48;
} else
tf->flags &= ~ATA_TFLAG_LBA48;
/*
* Always copy low byte, device and command registers.
*/
tf->feature = scsicmd[4];
tf->nsect = scsicmd[6];
tf->lbal = scsicmd[8];
tf->lbam = scsicmd[10];
tf->lbah = scsicmd[12];
tf->device = scsicmd[13];
tf->command = scsicmd[14];
} else {
/*
* 12-byte CDB - incapable of extended commands.
*/
tf->flags &= ~ATA_TFLAG_LBA48;
tf->feature = scsicmd[3];
tf->nsect = scsicmd[4];
tf->lbal = scsicmd[5];
tf->lbam = scsicmd[6];
tf->lbah = scsicmd[7];
tf->device = scsicmd[8];
tf->command = scsicmd[9];
}
/*
* Filter SET_FEATURES - XFER MODE command -- otherwise,
* SET_FEATURES - XFER MODE must be preceded/succeeded
* by an update to hardware-specific registers for each
* controller (i.e. the reason for ->set_piomode(),
* ->set_dmamode(), and ->post_set_mode() hooks).
*/
if ((tf->command == ATA_CMD_SET_FEATURES)
&& (tf->feature == SETFEATURES_XFER))
return 1;
/*
* Set flags so that all registers will be written,
* and pass on write indication (used for PIO/DMA
* setup.)
*/
tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE);
if (cmd->sc_data_direction == SCSI_DATA_WRITE)
tf->flags |= ATA_TFLAG_WRITE;
/*
* Set transfer length.
*
* TODO: find out if we need to do more here to
* cover scatter/gather case.
*/
qc->nsect = cmd->bufflen / ATA_SECT_SIZE;
return 0;
}
/**
* ata_get_xlat_func - check if SCSI to ATA translation is possible
* @dev: ATA device
@ -1425,6 +1864,10 @@ static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
case VERIFY:
case VERIFY_16:
return ata_scsi_verify_xlat;
case ATA_12:
case ATA_16:
return ata_scsi_pass_thru;
}
return NULL;
@ -1581,7 +2024,7 @@ void ata_scsi_simulate(u16 *id,
ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
break;
/* mandantory commands we haven't implemented yet */
/* mandatory commands we haven't implemented yet */
case REQUEST_SENSE:
/* all other commands */

3
drivers/scsi/libata.h
View File

@ -44,10 +44,11 @@ extern void ata_dev_select(struct ata_port *ap, unsigned int device,
unsigned int wait, unsigned int can_sleep);
extern void ata_tf_to_host_nolock(struct ata_port *ap, struct ata_taskfile *tf);
extern void swap_buf_le16(u16 *buf, unsigned int buf_words);
extern int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg);
extern int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg);
/* libata-scsi.c */
extern void ata_to_sense_error(struct ata_queued_cmd *qc, u8 drv_stat);
extern int ata_scsi_error(struct Scsi_Host *host);
extern unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf,
unsigned int buflen);

3
include/scsi/scsi.h
View File

@ -113,6 +113,9 @@ extern const char *const scsi_device_types[MAX_SCSI_DEVICE_CODE];
/* values for service action in */
#define SAI_READ_CAPACITY_16 0x10
/* Values for T10/04-262r7 */
#define ATA_16 0x85 /* 16-byte pass-thru */
#define ATA_12 0xa1 /* 12-byte pass-thru */
/*
* SCSI Architecture Model (SAM) Status codes. Taken from SAM-3 draft